Page 2648 - Foton Workshop Manual - Sauvana

62-596 DIAGNOSIS-ENGINE CONTROL SYSTEM

THE COLD CAR STARTS DIFFICULTLY, THE CAR IS TREMBLED

Fault phenomenon Diagnosis logic Possible reasons

• Poor fuel quality
• Inlet system • Leakage in the gas intake
• Fuel temperature system
• Coolant temperature sensor • Low fuel pressure
• Air flowmeter • Block in the air filter
• Fuel injector
The cold car starts • Ignition timing • Water temp sensor fault
difficultly, the car is • Wrong mixture ratios • Air flow meter failure
trembled • Ailure of idling control valve
• Carbon decomposition of cylinder valve • Injector does not work when
and inlet channel
cold starts
• Inlet pressure temperature sensor • Leakage of the injector
• Idle speed motor • Too low of t he cylinder
• The fuel quality
compression pressure

Diagnosis Procedure
1. Check the motor data

(a). Ignition switch: LOCK。
(b). Connect the diagnosis tool with the fault diagnosis connector (16pins) on the lower
left of the dashboard.
(c). Ignition switch: Turn on the ignition switch, and start the diagnostic tool.
(d). Read the motor data shown on the diagnostic tool.

Check whether the data flow is normalor not.
YES>To step 2.
No >Maintenance related faults.

2. Check battery

(a). Start the motor，check battery voltage。

Is the inspection result normal?

YES>To step 3。
No > Replace the battery or charge the battery

3. Check the starter

(a). Check whether the starter or the starter circuit has fault.

Is the inspection result normal?
YES>To step 4。
No >Exclude the problem and confirm that the phenomenon no longer exists.

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